Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for switching a secondary cell to a primary cell. A user equipment (UE) monitors a first radio condition of the UE for beams of a primary cell and a second radio condition for beams of one or more secondary cells configured for the UE in carrier aggregation. The UE transmits a request to configure a candidate beam of at least one candidate secondary cell as a new primary cell in response to the first radio condition not satisfying a first threshold and the second radio condition for the at least one candidate secondary cell satisfying a second threshold. A base station determines to reconfigure at least one secondary cell as the new primary cell. The base station and the UE perform a handover of the UE to the new primary cell.

Abstract: An air guiding structure is applied in a projecting device. The projecting device at least includes an optical element. The air guiding structure includes a first side wall and a second side wall. The first side wall having a first opening is disposed near a side of the optical element. The second side wall having a second opening is disposed near the other side of the optical element. Furthermore, the first side wall and the second side wall are connected to each other. The air is guided into the first opening, circulated through the optical element and is vented out via the second opening.

Abstract: An electronic device. The electronic device comprises a heat source, a housing having an inlet and an outlet, a fan disposed in the housing and selectively rotating at a first speed and a second speed higher than the first speed to generate air flow in the housing to cool the heat source, and a plurality of louvers disposed on the housing, having adjustable angles and selectively positioned at a first angle and a second angle. When the louvers are positioned at the first angle, the fan rotates at the first speed, and when the louvers are at the second angle, the fan rotates at the second speed.

Abstract: A projector lamp module for use with a cooler is provided. The lamp module comprises a light device, a housing and at least one cover. The housing is disposed on one end of the light device. An airflow entrance is formed on the housing. The cover plate is movably disposed on the housing and covers the airflow entrance. When the lamp module and the cooler are assembled together, the cover plate is removed and uncovered the entrance draft.

Abstract: An air guiding structure is applied in a projecting device. The projecting device at least includes an optical element. The air guiding structure includes a first side wall and a second side wall. The first side wall having a first opening is disposed near a side of the optical element. The second side wall having a second opening is disposed near the other side of the optical element. Furthermore, the first side wall and the second side wall are connected to each other. The air is guided into the first opening, circulated through the optical element and is vented out via the second opening.

Abstract: A projecting device includes a lamp, a supporting structure and a fan. The supporting structure includes a supporting portion and a flange. The supporting portion having a first chamber covers the lamp. The supporting portion has a first sidewall and an opposite second sidewall, and an entry and an exit are respectively disposed thereon. The flange extends from the supporting portion and surrounds a second chamber. The first and second chambers are connected to each other to form a space inside the supporting structure. The fan is for generating airflow running through the entry and the exit. The supporting structure further has an aperture for communicating the space and outside of the supporting structure.

Abstract: An electronic device. The electronic device comprises a heat source, a housing having an inlet and an outlet, a fan disposed in the housing and selectively rotating at a first speed and a second speed higher than the first speed to generate air flow in the housing to cool the heat source, and a plurality of louvers disposed on the housing, having adjustable angles and selectively positioned at a first angle and a second angle. When the louvers are positioned at the first angle, the fan rotates at the first speed, and when the louvers are at the second angle, the fan rotates at the second speed.

Abstract: A cooling module of a projector is provided. The cooling module is disposed in a housing. The projector includes several heat generating components and the housing has a first side and a second side. The cooling module includes a first cooling path, a second cooling path and a first fan. The second cooling path is adjacent to the first cooling path. Between the first cooling path and the second cooling path are several heat generating components. The first fan is disposed on the second side of the housing. The first fan leads part of the heat generated by the heat generating components to flow along the first cooling path and leads another part of the heat generated by the heat generating components to flow along the second cooling path.